merge revision(s) 57024: [Backport #13015]

	vm.c: check type of hash to merge

	* vm.c (core_hash_merge): check the type of the target hash to
	  merge.  [ruby-core:78536] [Bug #13015]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@58116 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 20 insertions, 0 deletions

diff --git a/test/ruby/test_keyword.rb b/test/ruby/test_keyword.rb
index df366845fe..3454c72d05 100644
--- a/test/ruby/test_keyword.rb
+++ b/test/ruby/test_keyword.rb
@@ -615,4 +615,24 @@ class TestKeywordArguments < Test::Unit::TestCase
     assert_equal(x, result)
     assert_kind_of(klass, result, bug12884)
   end
+
+  def test_kwrest_overwritten
+    bug13015 = '[ruby-core:78536] [Bug #13015]'
+
+    klass = EnvUtil.labeled_class("Parent") do
+      def initialize(d:)
+      end
+    end
+
+    klass = EnvUtil.labeled_class("Child", klass) do
+      def initialize(d:, **h)
+        h = [2, 3]
+        super
+      end
+    end
+
+    assert_raise_with_message(TypeError, /expected Hash/, bug13015) do
+      klass.new(d: 4)
+    end
+  end
 end